MD
Mary Duncan — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Louisa, Iowa
Our Model Tree links this Mary Duncan across the 1900, 1910 and 1920 US Censuses in Louisa, Iowa (XGBoost, ~Confirmed) — first a head (b.~1848), then head of a 2-person household.
Age 72
b. ~1848
Female
Head
Born: Tennessee
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | Louisa, Iowa |
| Surname | Duncan |
| Given Name | Mary J. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 72 |
| Marital Status | Widowed |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | Columbus Junction Town |
| Est. Birth Year | ~1848 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
2 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anna Duncan | Daughter | — | 48 | ~1872 |
| Mary Duncan | Head | — | 72 | ~1848 |
Census Appearances
1900
Louisa, Iowa
Spouse, age 56
Louisa, Iowa · implied b. ~1844 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Birth Month | Nov |
| Birth Year | 1844 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1910
Louisa, Iowa
Head, age 62
Louisa, Iowa · implied b. ~1848 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Widowed |
| Birthplace | Tennessee |
| Children Born | 5 |
| Children Living | 4 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1920
Louisa, Iowa
Head, age 72
Louisa, Iowa · implied b. ~1848 — 2 household members
| Surname | Duncan |
| Given Name | Mary J. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 72 |
| Marital Status | Widowed |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Duncan across 3 US Census years (1900, 1910 and 1920) in Louisa, Iowa, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Duncan
Head · 1920 · age 72 · b. ~1848 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Louisa, Iowa
Open full size
1920 US Federal Census — Louisa, Iowa
Page Contents
49 people indexed on this census page (ia:1920:14thcensusofpopu495unit:0875)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Samuel L. Pruitt | 63 | Head | Horse Buyer | Indiana |
| 52 | Mattie Pruitt | 52 | Wife | None | Illinois |
| 53 | Ethel Pruitt | 27 | Daughter | Clerk | Iowa |
| 54 | Elwood Pruitt | 24 | Son | Teamster | Iowa |
| 55 | Della Pruitt | 20 | Daughter | None | Iowa |
| 56 | Forrest Pruitt | 17 | Son | Helper | Iowa |
| 57 | Howard Pruitt | 15 | Son | — | Iowa |
| 58 | Charles Pruitt | 13 | Son | — | Iowa |
| 59 | Bristol Pruitt | 10 | Son | — | Iowa |
| 60 | Martha J. Pruitt | 6 | Daughter | — | Iowa |
| 61 | Harry R. Piette | 30 | Head | Druggist | Iowa |
| 62 | Dora N. Piette | 31 | Wife | None | Iowa |
| 63 | Walter W. Piette | 7 | Son | — | Iowa |
| 64 | Mattie Ritchie | 47 | Head | None | Iowa |
| 65 | Alfred Ritchie | 21 | Son | Laborer | Iowa |
| 66 | Charles Ritchie | 15 | Son | — | Iowa |
| 67 | Curtis Ritchie | 14 | Son | — | Iowa |
| 68 | Frank L. Darrow | 63 | Head | Doctor | Iowa |
| 69 | Mary G. Darrow | 52 | Wife | None | Iowa |
| 70 | Julia D. Darrow | 18 | Daughter | — | Iowa |
| 71 | Joseph Shideler | 33 | Head | Superintendent | Iowa |
| 72 | Mabel Shideler | 32 | Wife | None | Iowa |
| 73 | Bob Shideler | 2 | Son | — | Iowa |
| 74 | Mabel J. Shideler | 1 | Daughter | — | Iowa |
| 75 | Jacob Honft | 64 | Head | Implement | Iowa |
| 76 | Sarah Honft | 62 | Wife | None | Ohio |
| 77 | Brainard Strasser | 38 | Head | Editor | Iowa |
| 78 | Maud Strasser | 35 | Wife | None | Iowa |
| 79 | Woodrow Strasser | 6 | Son | — | Iowa |
| 80 | Messina Strasser | 5 | Daughter | — | Iowa |
| 81 | William Strasser | 2 | Son | — | Iowa |
| 82 | Paul Strasser | 0 | Son | — | Iowa |
| 83 | Daniel Neff | 62 | Head | Laborer | Pennsylvania |
| 84 | Mary J. Duncan THIS PERSON | 72 | Head | None | Tennessee |
| 85 | Anna L. Duncan | 48 | Daughter | None | Iowa |
| 86 | Ammon Fullerton | 32 | Head | Plumber | Minnesota |
| 87 | Mabel Fullerton | 28 | Wife | None | Indiana |
| 88 | Velma Fullerton | 7 | Daughter | — | Iowa |
| 89 | Ruth Fullerton | 6 | Daughter | — | Iowa |
| 90 | Kelvey Story | 28 | Head | Teamster | Iowa |
| 91 | Mabel Story | 28 | Wife | None | Iowa |
| 92 | Dan V. Story | 8 | Son | — | Iowa |
| 93 | Eliza Lambert | 84 | Head | None | Pennsylvania |
| 94 | Carrie Matthews | 50 | Daughter | None | Pennsylvania |
| 95 | Harry D. Matthews | 54 | Son-in-law | Machinist | Wisconsin |
| 96 | Wayne C. Whiteside | 41 | Head | Editor | U. S. |
| 97 | Lola C. Whiteside | 32 | Wife | None | Kansas |
| 98 | Leland Whiteside | 5 | Son | — | Iowa |
| 99 | Fredric Whiteside | 3 | Son | — | Iowa |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)